N1 (from Mayer & Moret online guide), Hollow Roof

The hollow part is below the roof. Sit-start and come out on the left. Incredible foot hook; get the big black knob on the left, throw to a good knob on the black part low on the right, move up your left foot, and top out using the crack in the middle of the top. Say V2+ (you need good flexibility and sufficient reach to get the good knob on the right while holding the large black knob on the left; if you're shorter than 5'7", call it V4-ish)